Embroidery stitching sewing machine

ABSTRACT

The disclosure relates to an embroidery stitching sewing machine in which a laterally oscillatable needle-bar can be selectively connected to any cam of a plurality of cams for providing zigzag and ornamental stitching, and in which a work fabric feeding device can be automatically controlled by cam means for providing a feeding sequence including forward and rearward steps. Said cam means comprise one cam of such cam track profile to provide a sequence comprising two steps forward and one step backward to produce a stitching wherein in any stitch pitch three sewing stitches are present, the cams of said plurality providing ornamental and utility embroidery and zigzag patterns compatible with said sequence.

United States Patent [72] Inventor Luigi Vigorelli 80, Viale Partigiani,27100 Pavia, Italy [21 Appl. No. 822,862

[22] Filed May 5,1969

[45] Patented May 25, 1971 [32] Priority May 8, 1968 [3 3 Italy [54]EMBROIDERY STITCHING SEWING MACHINE 8 Claims, 13 Drawing Figs.

[52] US. Cl 112/158, 1 12/102 [51] Int. Cl D05b 3/02 [50] Field ofSearch112/98, 102, l 5 8 [56] References Cited UNITED STATES PATENTS 2,653,5579/1953 Casas-Robert et 112/98 2,976,830 3/1961 Vigorelli 112/1583,065,716 ll/1962 Vigorelli 112/158 3,221,687 12/1965 Hayashi et al.112/158 3,253,559 5/1966 D'Amico 112/158 3,433,092 3/1969 I-Ianyull2/158X Primary ExaminerAlfred R. Guest Attorney-Michael S. Striker ingforward and rearward steps. Said cam means comprise one cam of such camtrack profile to provide a sequence comprising two steps forward and onestep backward to produce a stitching wherein in any stitch pitch threesewing stitches are present, the cams of said plurality providingornamental and utility embroidery and zigzag patterns compatible withsaid sequence.

PATENTED HAY25 l97| SHEET UF 4 WIN WIN mg a INVENTOR.

EMBROIDERY STITCHING SEWING MACHINE BACKGROUND OF THE INVENTION Thisinvention relates to sewing machines, and more particularly to sewingmachines capable of selectively producing automatically a wide varietyof utility and ornamental embroidery stitch patterns.

More detailedly, this invention concerns the art of sewing machinecomprising a laterally oscillatable needle-bar, cam means foroscillating said needle-bar according a predetermined cycle comprising arather large plurality of stitches, such as stitches, a feedingmechanism for progressing the work fabric in longitudinal direction on amachine worktable and cam driven means for actuating said feedingmechanism so that rearward feeding of work fabric steps are included ina feeding cycle comprising a greater number of forward feeding steps.Such machines can also comprise a slide plate forming a part of saidwork plate, laterally shiftable together with the work fabricprogressing feed-dog means, and cam means for reciprocating said slideplate and feed-dog transversally to the direction of progression of saidwork fabric.

A number of machines as above have been proposed and produced. In theU.S. Pat. No. 2,976,830 issued on Mar. 28, 1961 to late ArnaldoVigorelli, there had been described an ornamental stitch sewing machineincluding the above features, and wherein the needle-bar oscillatingmeans comprise a plurality of coaxial carns each one of which couldindividually and selectively be engaged by one cam follower forselection of the automatically produced zigzag and embroidery pattern.

In my U.S. Pat. No. 3,065,716 another machine of the above consideredtype has been described as comprising coaxial needle-bar oscillating cammeans, feed-dog driving cam means and slide plate shifting cam means,together with movement amplitude adjusting means and various features.

Broadly speaking, such and other prior art machines have been proved tobe subject to certain objections and disadvantages. Such machines are ofcomplicated and therefore costly manufacture, require careful handlingand constant maintenance, as proper indexing and phase of the greatnumber of components is to be carefully maintained. Such machines havean exceptional flexibility to the most various embroidery stitchingbecause they are provided with adjusting means. Thus, in the priormachines there are comprised operator-controllable means for varying thezigzag stitching width, the slide plate shifting amplitude, the meanline of stitching relatively to the middle of needle-bar oscillation,and so on, in addition to conventional adjustment of the work fabricfeeding pace, that is of the stitching longitudinal pitch.

While it is fully acknowledged that the ability of producing asubstantially infinite variety of ornamental embroidery patterns, by theuse of a number of such prior art machine, is still unsurpassed, suchmachines cannot provide certain stitchings in demand, such as expansiblestitching, that is stitches which can adapt themselves to asubstantially large stretching of the work fabric, namely of knittedfabrics, of fabrics woven with resilient polyamide or other syntheticfilamentary material, and the like.

In addition, such machines require a very skilled operator for properlyand safely operating same. A not proper action on the numerous controlmeans can spoil the work and even cause damage to the mechanisms. Ingeneral, a part and even a small part only of the abilities of such overcapable machines are enjoyed and actually made use of by the most ofoperators, in particular by housewives part.

Upon a consideration of the above and other factors, I have found that anumber of modes of producing embroidery stitching are essential andcritical for profitably making use of such machines, while a greatnumber of potential abilities are actually superfluous and undesired,and while other stitches, namely the expansible" ones, are on thecontrary desirable. Further, I have found that a fully automatizedembroidery stitching sewing machine would be very desirable if ofdrastically simplified construction and operation.

SUMMARY OF THE INVENTION It is therefore an object of this invention toprovide a new and improved machine as above defined, and which comprisesa plurality of coaxial cams each adapted for cooperation with one camfollower drivingly connected to the needle-bar oscillating support meansand each of such cam track to impart to said needle-bar a cycle ofoscillation providing an embroidery pattern, different from the patternsprovided by other cams, a first cam follower shiftably supported forselective engagement with any of said cams, and operator-controlledmeans for selectively shifting said first cam follower, the improvementcomprising a second cam follower, drivingly connected to the machine'sfeeding mechanism control means, detachably engageable with a cam trackwith which one feeding controlling cam is provided, said latter camtrack being such to impart to the feed-dog means a sequence of motionscausing the work fabric to move forward for a given plurality of stepsand then move backward for number of steps corresponding to that of suchplurality minus one.

The most preferred sequence is two steps forwardone step backward, andthe said feeding controlling cam has a cam track such to provide suchsequence.

According to a most preferred feature of the invention, said feedingcontrolling cams is one component of said plurality of coaxial cam andit is selectively engageable by the said first cam follower also.

The machine can be also provided with a slide plate for lateralreciprocation of the feed-dog means, a third cam follower connected tosaid slide plate, and a particular cam not forming part of saidplurality for engagement with said third cam follower.

According to another aspect of the invention, the first-cam follower ismechanically linked to the needle-bar oscillatable support to impart tosaid support a lateral reciprocation the amplitude of which is afunction solely of the cam track profile of the cam actually engaged bythe said first cam follower, no adjusting means being provided foradjusting said amplitude. As a matter of fact, I have found thatornamental embroidery stitchings are actually produced only at thegreatest width that the sewing machine can provide and that, therefore,a relevant structural simplification and a safer operation can providedby unadjustably linking said first cam follower to said oscillatablesupport.

According to a further aspect of the invention, the greatest part orpreferably all cams comprised in said plurality are provided with camtracks of such profile to provide a first attractive ornamental or autility stitching pattern when the sole needle-bar oscillating means areactivated, and a second quite different ornamental or utility stitchingpattern is also provided when both needlebar oscillating means and thework fabric feeding control means are activated, whereby the number ofstitch patterns selectively available is twice that of cam comprised inthe said plurality, the said aspect of the invention being dependentfrom a compatibility of the cam track profiles with the said sequence ofstepped forward and backward motions.

These and other useful objects, advantages and features of the inventionwill be apparent from the following detailed disclosure of a preferredembodiment thereof, as shown in the accompanying drawings, forming andessential component of this disclosure.

THE VIEWS OF THE DRAWINGS FIG. 1 is a perspective diagrammaticalillustration of the machine, having parts broken away for showing theessential components and mechanisms thereof;

FIG. 2 is a fragmentary perspective view of same machine, forillustration of its simplified control means;

FIG. 3 is partly a side view and partly a sectional view, takensubstantially along line III-IIIIIIIII of FIG. 5, of the mechanismsincluding the cams;

FIG. 4 illustrates part of the mechanisms of FIG. 3, upon deactivationof the feeding automatic control means;

substantially along line v-v-v v of FIG. 3;

FIG. 6 is a top plan view of cam selectively engaging mechanism andfirst cam follower;

FIG. 7 is a fragmentary greatly enlarged side view of the cam trackselectively engageable with either first and second cam followers;

FIG. 7A is an enlarged plan view of the stitching produced by engagingthe first cam follower only with the cam of FIG. 7;

FIGS. 7B and 7C illustrate two ornamental and utility stitching patternsobtained by simultaneously engaging (in different phase relationship)both first and second cam followers with same cam of FIG. 7;

FIG. 7D diagrammatically illustrates the utility stitching produced byengaging the second cam follower only with same cam of FIG. 7; and

FIGS. 8A and 8B diagrammatically illustrate a plurality of ornamentaland utility stitching patterns obtained by differently activating anddeactivating the cam controlled and driven mechanisms.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT In general, as shown inFIG. 1, the machine comprises a needle-bar 10 supported for lengthwisereciprocation (pro- 'vided by conventional means, not shown) in anoscillatable support 11, pivoted at 12 to the machine structure, thelateral oscillation being imparted by a conventional pitman 13, indirections AB. The work fabric feeding is provided by conventionalup-and-down and back-and-forth motion of a feeddog 14, driven by amechanism comprising a conventional link 15 and a rotativelyreciprocatable shaft 16.

As known by those skilled in the art, the actual prevalent forwardprogressing in direction C of the work fabric, or the temporary backwardmotion thereof, in direction D, and the pace at which such motionsoccur, are provided by adjusting the phase relationship betweenup-and-down and back-andforth motions of feed-dog 14 and respectivelythe amplitude of rotary reciprocation of shaft 16.

The machine comprises a group of coaxial cams, and first cam follower 21supported either for reciprocation in direction AB" and for shifting indirection E-F, parallel to the cam axis. Such first follower is linked(for example as hereinbelow described) to the pitman 13 for driving suchpitman in direction A'-B and therefore oscillating the needlebar, at anamplitude determined solely by the cam track According to the fact thatgenerally the production of zigzag stitchings of two different widths isdesirable for utility purposes, preferably at least two cams of suchprofile for selectively providing such desired stitchings are comprisedin the group 20.

An operator-controlled knob 30 (FIG. 2) is provided for selectivelyshifting the first cam follower 21 in direction E-F, by displacing suchknob in direction EF'. The mechanism is designed so that at one endposition of displacement EF of knob 30, the first cam follower 21 willbe shifted outside the span covering the cam group 20, to deactivate theneedle-bar oscillating mechanism.

A second cam follower 22 is provided for engaging, at operators command,one given cam in said group 20. Such given cam will be discussed belowand it is indicated at 20A in FIGS. 3 to 5 and 7. The motion C"D of saidsecond cam follower 22, when engaged with said given cam, controls thesaid phase relationship and amplitude of motions of feed-dog 14.

Upon deactivation of second cam follower 22, the said phase relationship(to provide backward motion of work fabric) is under operator control,as conventional, by acting on a control lever 34 in direction IL, andthe said amplitude is also conventionally adjustable by acting upon aknob 33, in direction G, the motion in said direction G leading to anincreasing of pace, or length of stitches. Preferably, the same knob 33is made use of for operators activation and deactivation of theautomatic feeding, that is the mechanism having said second cam followeras this prime mover. The activation of such mechanism is provided byfurther rotating the knob 33 in direction H, beyond the position of zerostitch length.

The machine is preferably but not necessarily provided with a third camfollower 23, and with a slide plate 24 which can be laterallyreciprocated in direction OP upon reciprocation ()-P"of said third camfollower, provided by a particular cam preferably of such cam trackprofile to provide a path for the stitching including a plurality ofarcs or curves, each including a number of stitches corresponding to acomplete revolution of the cam group 20, that is to a complete recurringembroidery pattern as provided by any of the cams of group Activationand deactivation of said third cam follower 23 can be provided by actionexerted in direction MN on a small knob 31.

The simplicity of operation by the operators part is evident from aconsideration of FIG. 2. The machine, while fully automatized andcapable of providing a wide variety of stitch patterns, includes anexceedingly small number of knobs. No incompatible or erroneousmanuevering can be made by an even unskilled operator. Upon deactivationof all mechanisms, the machine provides the plain straight stitching ata pitch adjustable by acting in direction G on knob 33. By acting onknob 30, a selection between a plurality of zigzag or embroidery patterncan be made, having the best predetermined width and the pitch adjustedat will by acting on knob 33.

By rotating the same knob 33 in direction H, the feed of work fabric isplaced under automatic control to provide new and useful stitchings, asdiscussed below. By further acting on the knob 31, any of the straight,embroidery and utility stitching can be combined with the effectresulting from lateral reciprocation of the work fabric.

The preferred construction on the various mechanisms related to theinvention will be evident from a consideration of FIGS. 3 to 6, whereinthe other conventionally constructed means, such as the drive means, thestitch forming means and so on, have been omitted as not forming part ofthis invention.

The group 20 of cams is supported and driven by a shaft 40 (FIGS. 3 and5) connected by worm gears 41 and 42 to the machine main shaft 43. Thefirst cam follower 21 is secured to or integrally made with a sleeve 44(FIG. 6) slidably supported in direction E-F in an oscillating structure45, oscillatable, together with the cam follower 21, about shaft 46(FIG. 3). The structure comprises a triangular lever 47 to which apitman portion 48 is pivotally connected. Such pitman portion 48 isadjustably connected, by conventional means, to pitman 13 of FIG. I. Asfar as the scope and the objects of the invention are concerned with,the lever 47, which is oscillated by the first cam follower 21, can beassumed to be rigidly connected to the oscillatable support 11 of theneedle-bar 10 (FIG. I) by a pitman member comprising the portions 13 and48 The knob 30 (FIGS. 5 and 6) is secured to a lever 49 pivoted at 50and which can be selectively secured in any position of a plurality ofpositions defined by a rack 51 (see FIG. 3), each one of whichcorresponds to engagement of the first cam follower 21 with a given onecam of group 20. An arm 52 (FIG. 6) provides the shifting E--F of sleeve44 and of cam follower 21 upon action exerted upon knob 30.

The second cam follower 22 is located coplanarly with one given cam 20Aof group 20. It is formed by the end portion of a lever 53 journaledabout the shaft 54 of the knob 33. Another lever 55 is also journaledabout shaft 54 and has a pin 56 secured to its free end. Such pin abutsfrom above on one end of a two-armed lever 57 (FIG. 5) the other end ofwhich is pivotally connected to a pitman 58 which is connected to aconventional device, generally indicated at 59, for phase and amplitudeadjustment of the motion C'D of shaft 16, that is of work fabricfeeding. The operation of the device, as shown in FIG. 5, is well knownin the art and it will not be described.

Such device is also conventionally operator controlled by acting on theknob 33, when the automatic feeding control means are deactivated. Theoperator control is provided by a conventional device 69 engaging withina conventionally shaped groove (indicated at 68 in FIG. 3 indot-and-dash lines) provided into a disclike component 66 secured to theshaft 54 and rotatively connected to knob 33. The said device 69 is alsoconnected to pitman 58 by means of a second twoarmed lever 70. Themanual adjustment of the stitching pitch is provided when the knob 33 isrotated as indicated at G in FIG. 2.

The outer or peripherical face of said disclike component 66 formshowever a cam track having a protruding arc portion 66, which engages apin 65 (FIG. 3), when the knob 33 is rotated in direction H of FIG. 2,supported at one end of a small two-armed lever 62 oscillatable about apivot pin 61 secured to said another lever 55, causing the opposite end63 of said small lever 62 to abuttingly engage a notch 64 of the lever53, and thus maintaining the two coaxially swingable levers 53 and 55 ata given angular relative displacement, against the force exerted by aspring 60, connected between said levers and biasing such levers towardseach other.

Therefore, when the said small lever is in the position shown in FIG. 3,the device is activated because the motion of the second cam follower22, that is of lever 53, causes a corresponding motion of lever 55 andof link 58, thus a control of device 59. Such activation is provided byrotating in direction H said knob 33, that is by causing the part 66' ofthe camming periphery of component 66 to urge (by means of pin 65) thesmall lever 62 to said position.

If the knob 33 and hence the component 66 is rotated in direction G(FIG. 2), the part 66 of said camming periphery will no more engage thepin 65 and will disengage the end 63 from notch 64, so that the spring66 will space the second cam follower 22 from the camming track of cam20A, as shown in FIG. 4, therefore providing deactivation of theautomatic feeding control.

The third cam follower 23 is formed at one end of another two-armedlever pivotally supported by a pivot pin at 28, and the other end 26 ofwhich is pivotally connected to a link or pitman 27 which isconventionally connected to the slide plate 24, urged in direction by aspring 29. This latter mechanism is conventional in the art, and it canbe deactivated at operator command by acting of the small knob which bymeans of a lever 32 (FIG. 5) conventionally spaces the third camfollower from the track of its particular cam 25.

As shown in FIG. 3, wherein said cam 25 is mostly shown by a phantomline, as being concealed by cams of group 20, the periphery of such camis shaped according to a cardioid configuration, for cyclicallyimparting to the slide plate 24 a lateral reciprocation such to providea stitching path formed by a number of curved portions.

The important to configuration of cam A will be now discussed withreference to FIGS. 7 and 7A-7D. In FIG. 7 the angular displacement ofthe cam, between any second stitch formation and step of progression ofthe feeding means, is indicated at P. The cam track comprises a sequenceof protruding and recessed parts 80 and 81, the protruding parts 80spanning each one circular pitch P", while the recessed parts span twocircular pitches P.

Said cam 20A can simultaneously engage both first and second camfollowers 21 and 22, as shown. As conventional, as first cam follower 21is concerned, the engagement with parts 80 and 81 causes a stitchcrossing the mean stitching line. As the second cam follower 22 isconcerned, engagement on a recessed part leads to regular forwardfeeding of work fabric, while when a protruding part is engaged, thefeeding mechanism will move one step rearwards the work fabric.

Assuming now that the first cam follower 21 only is active, that isengaging cam 20A, a stitching pattern such as shown in FIG. 7A isprovided. Such pattern is a "modified zigzag, wherein between any twosubsequent pair of zigzag stitches p' and p", a straight stitch p isprovided, all said straight stitches p being aligned along a line at oneside of the zigzag basic stitch pattern.

The cam 20A provides a sequence of feeding one back and two forth," whenacting on second cam follower 22. When both cam followers'21 and 22engage the cam, one of the stitches p, or p, or p will be made inbackward motion of the work fabric, according to the relative angularposition of cam followers with respect to the cam track profile. In thepattern of FIG. 7 B the stitches p are made in backward motion of thefabric, while in FIG. 7C the straight stitches p are backwardly made.

The novel stitching of FIG. 7C is of particular interest. It is acrossed zigzag of attractive design and of relevant utility for joiningfabrics, sail cloths and so on. It is longitudinally expansible as aconventional zigzag stitching is.

By the activation of second cam follower 22, the above sequence providesthat, in any longitudinal pitch P of the stitching, three stitches arepresent. Such feature provides a new and useful straight stitching suchas shown in FIG. 70, when the second cam follower 22 alone is active.For clarity of illustration, in FIG. 7D the stitching apparentlycomprises two straight laterally spaced lines and diagonalstherebetween. It must be imagined that actually all stitches present inany pitch P' are superimposed so that a triple" straight seam is madewhich is also expansible as a zigzag stitching is. In addition, it is asoft, relieved stringlike attractive stitching.

The effects resulting by activating and deactivating the second camfollower operated mechanism, while the first cam follower operated oneis active, can be readily understood by a comparison of the stitchingpatterns of FIGS. 8A and respectively 88. For example:

the conventional zigzag pattern 82b will become a triple" zigzag such asat 82a, upon activation of second cam follower 22;

the stepped zigzag 83b (that is a stitching wherein the complete zigzagreciprocation comprises six 'stitches) will provide the very attractiveembroidery stitching indicated at 83a, comprising a plurality of smalladjacent diamonds;

among the others, the lowest pattern of FIG. 8B, which is a furthermodified zigzag of interest, provides the very attractive loweststitching of FIG. 8A, which is similar to the so called Turkish stitch"in demand and which can be provided by special purely professionalembroidery machines.

Any pattern either straight and zigzag or embroidery can be modifiedinto a curves path by activating also the slide plate mechanism, if themachine is provided with. The patterns indicated at 83b and 83a areexamples thereof.

Iclaim:

1. In a zigzag sewing machine, in combination, an embroidering devicecomprising a needle-bar having a needle; drive means for effecting upand down movements of said needie-bar so that said needle makessuccessive penetrations of a fabric; first rotary cam means and firstcam follower means operatively connected with said needle-bar foroscillating the same in opposite transverse strokes between two extremepositions for making transverse opposite strokes in synchronism withsaid up and down movements so that said needle makes a fabricpenetration at the beginning and at the end of opposite transversestrokes and produces transverse stitches; reversible feeding means forfeeding the fabric under said needle; and second rotary cam means andsecond cam follower means operatively connected with said feeding meansfor effecting cyclical operation of said feeding means so that thefabric is moved in a plurality of steps forward, and then one steprearward during each cycle, said first and second cam means beingsynchronized so that a step of the fabric takes place between twoopposite transverse strokes and between two successive fabricpenetrations by said needle.

2. An embroidering device as claimed in claim 1 wherein said first cammeans has an axis of rotation and includes cam track portions concentricwith said axis and having such a circumferential extension that astraight line stitch is made between two fabric penetrations, and otherrising and falling cam track portions by which said opposite transversestrokes are effected.

3. An embroidering device as claimed in claim 2 comprising adjustingmeans for circumferentially.adjusting at least one of said first andsecond cam follower means in circumferential direction of the respectivecam means so that either a straight line stitch or a transverse zigzagstitch is made during the rearward step of the fabric.

4. An embroidering device as claimed in claim 1 wherein said feedingmeans is controlled by said second cam means to move the fabric twosteps forward and one step rearward during each cycle.

5: An embroidering device as claimed in claim 1 wherein said first cammeans include a stack of pattern cams; and wherein said first camfollower means cooperates with any selected one of said pattern cams.

6. An embroidering device as claimed in claim 1 wherein said second cammeans includes a feed controlling cam located in said stack and adaptedto be selected for engagement with said first cam follower means whilebeing also engaged by said second cam follower means.

7. An embroidering device as claimed in claim 1 wherein said second cammeans include a feed controlling cam having a cam ftrac'k withprojecting and recessed portion, each recessed portions having twice thecircumferential extension than each projecting portion so that saidfabric moves two steps forward and one step rearward during each cycle.

8. An embroidering device as claimed in claim 1 wherein said feedingdevice includes adjusting means for adjusting the length of saidstitches and including a manually operable knob; comprising meansconnecting said knob with said second cam follower means so that thesame is spaced from said second cam means and inoperative in oneposition of said knob; and wherein said knob has other positions foroperating said adjusting means and for placing said second cam followermeans in engagement with said second cam means.

1. In a zigzag sewing machine, in combination, an embroidering devicecomprising a needle-bar having a needle; drive means for effecting upand down movements of said needle-bar so that said needle makessuccessive penetrations of a fabric; first rotary cam means and firstcam follower means operatively connected with said needle-bar foroscillating the same in opposite transverse strokes between two extremepositions for making transverse opposite strokes in synchronism withsaid up and down movements so that said needle makes a fabricpenetration at the beginning and at the end of opposite transversestrokes and produces transverse stitches; reversible feeding means forfeeding the fabric under said needle; and second rotary cam means andsecond cam follower means operatively connected with said feeding meansfor effecting cyclical operation of said feeding means so that thefabric is moved in a plurality of steps forward, and then one steprearward during each cycle, said first and second cam means beingsynchronized so that a step of the fabric takes place between twoopposite transverse strokes and between two successive fabricpenetrations by said needle.
 2. An embroidering device as claimed inclaim 1 wherein said first cam means has an axis of rotation andincludes cam track portions concentric with said axis and having such acircumferential extension that a straight line stitch is made betweentwo fabric penetrations, and other rising and falling cam track portionsby which said opposite transverse strokes are effected.
 3. Anembroidering device as claimed in claim 2 comprising adjusting means forcircumferentially adjusting at least one of said first and second camfollower means in circumferential direction of the respective cam meansso that either a straight line stitch or a transverse zigzag stitch ismade during the rearward step of the fabric.
 4. An embroidering deviceas claimed in claim 1 wherein said feeding means is controlled by saidsecond cam means to move the fabric two steps forward and one steprearward during each cycle.
 5. An embroidering device as claimed inclaim 1 wherein said first cam means include a stack of pattern cams;and wherein said first cam follower means cooperates with any selectedone of said pattern cams.
 6. An embroidering device as claimed in claim1 wherein said second cam means includes a feed controlling cam locatedin said stack and adapted to be selected for engagement with said firstcam follower means while being also engaged by said second cam followermeans.
 7. An embroidering device as claimed in claim 1 wherein saidsecond cam means include a feed controlling cam having a cam track withprojecting and recessed portion, each recessed portions having twice thecircumferential extension than each projecting portion so that saidfabric moves two steps forward and one step rearward during each cycle.8. An embroidering device as claimed in claim 1 wherein said feedingdevice includes adjusting means for adjusting the length of saidstitches and including a manually opErable knob; comprising meansconnecting said knob with said second cam follower means so that thesame is spaced from said second cam means and inoperative in oneposition of said knob; and wherein said knob has other positions foroperating said adjusting means and for placing said second cam followermeans in engagement with said second cam means.